(N/A) The concept of evolution does not necessarily imply a progression from simple to complex organisms.
$1$. If we define evolution based on morphological complexity,then human beings appear more evolved than bacteria.
$2$. However,bacteria are highly successful organisms that have survived for billions of years in diverse and extreme environments.
$3$. They possess efficient metabolic pathways and rapid reproductive rates,which are evolutionary advantages.
$4$. Therefore,evolution is not a linear process of increasing complexity,but rather a process of adaptation to the environment. Both bacteria and humans are highly evolved in their respective ecological niches.